Hydraulic press.



HYDRAULIC PRESS.

APPLICATION FILED 00114, 1907.

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No. 882,045. PATENTED MAR. 17, 1908. W. ASTPALGK. v HYDRAULIC PRESS. APPLICATION FILED 001'.14,19o7.

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i 1 MW 2 a M l WW x /J J fl & 6M 1 9 W645 m No. 882,045. PATENTED MAR. 17, 1908.

W. ASTFALGK.

HYDRAULIC PRESS.

APPLICATION FILED O0T.14,1907.

5 SHEETS-SHEET 3.

No. 882,045. PATENTED MAR. 17, 1908.

w. ASTFALCK.

HYDRA ULIC PRESS.

APPLICATION FILED 0011.14. 1907.

" 5 SHEETS-SHEET 4.

O OO No. 882,045. PATENTED MAR. 17, 1908.

W. ASTPALCK.

HYDRAULIC PRESS.

APPLICATION FILED 0OT.14.1907.

5 SHEETS-SHEET 5.

ITED STATESPATENT OFFICE.

WILAND ASTFALCK, OF TEGEL, NEAR BERLIN, GERMANY.

HYDRAULIC PRESS.

Application filed October 14, 1907.

hydraulic presses.

In the case of the hydraulic press described I in the specification of my United States Letters Patent No. 860958 and my application for patent Serial No. 363476, the water for filling the pressure cylinder or cylinders is taken directly from a separate filling or supply cylinder coupled with the hydraulic ress-piston, and is subsequently conducted back. to the pump. W'hen the press-piston is lowered the water is sucked from the filling or su ply cylinder by the said piston and is also orced out of the said cylinder by the pump piston, and during the ascent of the press piston the pump-piston sucks water out of the pressure-cylinder and the presshas been placed on the work and the presscylinder is filled the pressing operation can 0111 be started by introducing water under hig ressure into the pressure cylinder; also t at during the pressing operation the pump piston must take part in the move ment of the press piston and ex el an additional quantity of water from tie filling or supply cylinder. This additional quantity cannot, howevenenter the pressure-cylinder,

owing to the high pressure in the latter, and in the case of myprevious specifications cited this water is forced into a return conduit.

' The present invention consists in applying the principle of my prior invention to steam hydraulic resses, so that the water expelled from the ing or supply cylinder during the ressing operation is not uselessly discharged to ut is introduced into the pump connecte the so-called pressure-intensifier, so that there is aclosed water-path between the latter and the press.

Another feature of the invention resides in the fact that all the valves are positively controlled from a central position, and. certain valves can be so operated as to cause the Specification of Letters Patent.

iston forces the water to the pump-cylinder.- t is, howev'er', obvious that when the stamp.

Patented March 17, 1908.

Serial No. 397,318.

Fig. 5 shows a detail of this mechanism.

Figs. 6 to 9 illustrate a modification of part of the controlling mechanism.

In Figs. I and 1., 10 is the frame, 11 the stamp, 12 the press-piston, 13 the pressure cylinder connected by a duct 14 to the fillingpnmp cylinder 15, and 16 the piston of the filling pump, connected by rods 17 to the cross-head 18 of the press-piston.

19, 19 are withdrawing or' return cylinders, the pistons 20 of which are connected to the cross-hezul 18.

21 is the steam cylinder of the pressure intensifier, 22 the piston therein, 23 a presspump cylinder and 24 the steam operated piston movable therein and connected to the iston 22. The space 25 above the piston 24 1s connected by a conduit 26 t0 the pressure cylinder 13, and the space 27.bclow it is connected by a conduit 28 to the filling or supply cylinder 15. lVhen the pressure intensifier is operated after the pistons 12 and 16 have been lowered the presspump piston 24 forces the water under pressure in.25 into the pressure cylinder 13, and the space 27 is re-' ders 15 and 13 there is a valve 29, the rod 30 of which is provided with an ex ansion link gulded in the frame part 31. T 's link consists of a cylinder 32 on said valve-rod 30,

and a piston 34 acted on by a spring 33. The

piston is connectedito a link 36 pivotedat 35 to the frame. A rod 37 connects the link 36 to a crank disk 39 rotatable about a shaft 38, said crank disk being connected to a chain-drum 42, for example by means of a chain drum and chain 40 41 respectively other means of connection can, however be used. The crank disk is provided with an arm 43 the purpose of which is to displace a spring-pressed pin 44 guided in. the casing 45 to prevent displacement of the controlling lever 63 from V to P, so that there is no pressure in the cylinder 13 until the valve 29 is closed, otherwise said pin 44'cannot enter the hole 73 in the rod 30 and the lever63 cannot plies live steam to the withdrawing or return cylinders 19 and the valve 50 is the exhaustvalve. 51 is the steam pipe. The pipe 52 connects the cylinders ,19 to the valve-case and the pipe 53 connects the.latter to the cylinder 21. The pipe 69 leads the dead steam from the valve box 46. The opening of the valves 47v to 50 is effected by thrust -rods '54, 55, 56 and 57 connected in pairs to double armed levers 60 61 pivoted at 58 and 59 respectively. The lever 61 is toothed and the lever 60 can be coupled with a toothedf segment 67 p'voted at 58'. The lever '63 is also pivoted a 58 but is fixed to the' lever 60 I and can be coupled ,to the toothed segment 67 by means of a pin 66 and lever 65 carried by thelever 63 and pivoted thereto at 64. For this purpose the pin 66 enters a hole 68 as shown in Fig. 5.

For clearness of illustration the valves 47 to v50 are shown side by side, but they may be which case the axes mechanism is as follows:

one behind the other, in 58 and 59 would coincide. The action of the press and controlling When the controlling lever is the position S shown in Fig. 1 the press is at rest, since steam from 51 can onl'y pass through valve 49- duct 7 O and pipe 52 to the withdrawing cylinder 19, in which it holds the piston 20 in the uppermost position. The ressure piston 12 and pump piston 16 are t us also held in their uppermost positions. 1 For-the pressing operation the controlling lever 63 is moved to position V, Fig. 2, so that the valve 49 is closed and valve 50 opened. The valve 47 remains closed and valve 48-open, but the crank disk 39 rotates through 90 degrees and the joint 36 is extended and the valve 29"opened. Steam from cylinder 19 flows through the open valve 50 and pipe 69, so that the piston 12, cross-head 18' stamp 11 piston 20 and piston 16 are arranged in pairs moved downwards till the stamp abuts on the Work 71 and thus meets resistance. The water expelled by the; piston 16 passes through the duct 14 and valve 29 into the cylinder 13. position P, Fig. 3. The rotation f the crank disk 39 flexes the joint 36 and closes the valve 29 and also moves the pin 44 upwards so that it enters the hole 7 3 and locks the valve-rod 30 before the lever 63 reaches position P and The lever 63 is then moved into closes valve 48 and opens valve 47. -While 4 the valve 29 is open the lever 63 cannot, therefore, be moved into the position in which the steam piston 24 ascends, acts on water in the chamber 25, and forces said water into the cylinder 13 through pipe 26.

Itmust be noted that after the valve 29 has been closed and locked, the crank 39 takes part in the further movement of the lever 63 and moves the knuckle of the joint 36 into its uppermost position." In order that" this can be effected without movement of the alve 29 the expansion link 32 34 is provided. When the valves 47 and 48 have been moved into the positions'shown in Fig. 3 live steam can flow through the duct 72 and pi space below. the piston 22 an thrust the latter upwards, with the pump piston 24. Pressure is thus exerted on the water in the space 25 of the pump cylinder, and this Water is forced through the pipe 26 into the pressure cylinder 13 and causes the piston 12 to perform the pressing operation. The water expelled from the cylinder 15 during this operation passes through the duct 28 into the c linder space 27,'that is to say there re- 'mains a contmuousstream of water between the pump cylinders 15 and 23 and the pres sure cylinder 13.

When the stamp is to be withdrawn the lever 63 is moved into that the valve-rod 30 1s unlocked, and the valve 29 opened, the steam valves 47 and 50 being closed and 48 and 49 being opened.

Steam flows from the cylinder 21 through pipe 53'valve 48 and pipe 69, and live steam flows through pipe 51, valve 49, duct 70 and 'pipe 52 into the cylinder 19 and thrusts the piston 20 upwards. the pistons and 25.

When the controlling lever 63 is moved back to'the position S the joint 36 is flexed downwards, the valve 29 closed, and the steam valves change their positions but not their functions.

For tapping'for smoothing with the stamp the lever 63 is placed in the position shown in Fig. 1 and disconnected from the segment 67 by withdrawing the pin 66 from the hole 68. Then the lever 63 is moved to a position be tween V and P, so that the steam cylinder 21 alternately communicates with the live steam pipe and exhaust and consequently causes a rapid succession of strokes to be delivered,

,The water expelled by inane position R, Fig.4, so

12 and 24 fiows into cyllnders 15' a e 53 to the.

connected to the valve-rod 30,

which are transmitted by the water in the cylinder 23 .to the piston 12. The Water expelled by the piston 16 during this operation flows directly through the pipe 28 into the'cylinder space 27, and back.

In order that the cylinder 19 need not be permanently under pressure while the press is at rest the valve 29 may be constructed as a doubleevalve, as shown for example in Figs. 6 to 9. The valve-rod 30 is in this case placed towards the left, butalso provided with an expansion link consisting of a cylinder 32 with a spring and piston. 'lhe piston rod 74 of this expansion link is connected to a frame 75 passing round the cylinders 13 and 15 but guided in the pressfrainc, said frame 75 being connected to the link mem- The second valve 29 is which also has an expansion link 32, guided in the frame part 31-. The piston rod 78 of this expanbers or joint 36.

' sion link is connected by the frame 79 to a second link part 86?. The parts 36 and 36" are connected to the rod 37 as in the construction shown in Fig. 1, but the rod 37 is guided at 80, so that on rotation of the disk 39 and'extension of the joint the frame and valve 29 are moved to the right, and the frame 75 and v live 29 to the left (Figs. 7 and 9) when s vice-versa on the flexing of the oint downwardly or upwardly the two frames are moved in the opposite directions, i. 6. towards each other, and the two valves are closed (Figs. 6 and 8). "hen the joint is in the upper position the valve rods 30 and 3O are locked, the rod 30f by the pin 44* actuated by the arm 43, and the rod 30 by the pin 44, which may be connected to the pin 44 by any suitable means.

In the example illustrated thereare two doublearmed levers S4 and S5 pivoted at C2 and 83 respectively and connected to,each other,'the lever 84 being also connected at 86 to the pin 44, and the lever carrying the pin 44.

The other parts of the controlling mechanism may be exactly as shown in Figs. 1 to 5. For clearness of illustration the steam valve controlling gear is only shown in Fig. 9.

Fig. 6 corresponds, as regards tne positions of the parts, with Fig. 1, Fig. 7 with Fig. 2, Fig. 8 with Fig. 3 and Fig. 9 with Fig. 4. If, in this form of construction, the pressure acting in the cylinders 19 from below is cut off by cutting off the steam in the pipe 51, the steam in the said cylinders gradually becomes cool, but the piston 12 and parts 1 1, 18,16, 17 and 20 cannot descend because the valve 29 prevents the passage of water from the cylinder 15. to the pressure cylinder 13.

What I claim as my invention and desire to secure by United States Letters Patent is:

1. In a hydraulic press the combination of a pressure cylinder, a filling cylinder, pistons in said cylinders, means of communication between said cylinders, return cylinders, pistons therein co-acting with the piston in the pressure cylinder, a "alve adapted to control communicationl between the pressure and filling cylinders, a pressure intensifier, a prcssurc pump coupled thereto, means of l amrmnication between said pressure pump and the filling and pressure cylinders, a fluid conlrclhng device, means of communication between the latter and the pressure intensiher and return cylinders respectivt y and means operated from the controlling device for actuating the aforesaid valve.

2. In a hydraulic press the combination of a pressure cylinder, a filling cylinder, pistons in said cylinders, means of communication between said cylinders, return cylinders, pistons therein co-acting with the piston in the pressure cylinder, a valve adapted to control communication between the pressure and filling cylinders, a pressure intensifier, a double acting pressure pump coupled thereto, icons of communication between said pressure pump and the filling and pressure cylinders, a fluid controlling device, means of commnnication between the latter and the pressure intensifier and return cylinders, and a. flexible joint and transmission mechanism interposed between the aforesaid valve and the controlling device and operated from the latter.

3. In a hydraulic press the combination of a pressure cylinder, a filling cylinder in communication therewith, pistonsin said cylinders, return cylinders, pistons therein coacting with the piston in the pressure cylinder, a spring controlled valve adapted 'to intercept communication between said pressure and filling cylinders, a pressure intensifier, a double acting pressure pump coupled thereto, means of communication between said pressure pump and the filling and pressure cylinders, a fluid controlling device, means of communication between the latter and the pressure intensifier and return cylin- 'ders, a flexible joint and transmission mechanism interposed between the aforesaid valve and the controlling device and operated from the latter and an expansible connection between the flexible joint and said valve. e

4. In a hydraulic press the combination of a pressure cylinder, a filling cylinder in communication therewith, pistons in said cylinders, return cylinders, pistons therein co-acting with the piston in the pressure cylinder, a spring controlled valve adapted to intercept communication between said pressure and filling cylinders, a pres sure intensifier, a double acting pressure pump coupled thereto, means of communication between said pressure pump and the filling and pressure cylinders, a fluid controllin device, means of connnunication between t e latter and the pressure intensifier and return cylinders, a flexible oint and transmission mechanism interposed between the aforesaid valve and the controlling device and operated from the latter and an expansible connection between the flexible joint and said valve, and means operated by the aforesaid transmission mechanism for locking said valve incits closed position.

5. In a hydraulic press the combination of a pressure cylinder, a filling cylinder, pistons in said cylinders, means of communication between said cylinders, return cylinders, pis- 'tons therein co-actmg with the piston in the pressure cylinder, a twin valve acting in-E ders, return cylinders, pistons therein coacting with the piston in the pressure cylin- ,return cylinders and a flexible ders, a twin valve adapted to act in opposite directions to control communication between the pressure and filling cylinders, a pressure intensifier, a double acting pressure pump coupled thereto, means of communication between said pressure pump and the filling and pressure cylinders, a fluid controlling device, means of communication between the latter and the pressure intensifier and joint and transmission mechanism interposed between the aforesaid valve and the controlling device and operated by the latter.

7 In a hydraulic press the combination of a pressure cylinder, a filling cylinder in communication therewith, pistons in said cylin ders, means of communication between said cylinders, return cylinders, pistons therein co-acting with the piston in the pressure cylinder, two interconnected valves adapted to act in'opposite directions to control com munication between the pressure and filling c linders, a pressure intensifier, a double acting pressure pump coupled thereto, means ofcommunication between said pressure pump and the filling and pressure cylinders, a steam controlling device, means of communication between. the latter and thepressure intensifier and return cylinders, a flexible joint and transmission mechanism interposed between the aforesaid valves and the controlling device and operated by the latter and an eXpansible connection between said flexible joint and each of said valves.

S. In a hydraulic press the combination of a pressure cylinder, a filling cylinder in communication therewlth, pistons in said cylinders, means of communication between said cylinders, return cylinders, pistons therein co-actmg with the piston in the pressure cylinder, two interconnected valves adapted to act in opposite directions to control communication between the pressure and filling cylinders, a pressure intensifier, a double acting pressure pump coupled thereto, means of communication between said pressure pump and the filling and pressure cylinders, a steam controlling device, means of communication between the latter and the pressure intensifier and return cylinders, a flexible joint and transmission mechanism interposed between the aforesaid valves and the controlling device and operated by the latter, and an expansible connection between said fleXible jointand each of'said valves and-means operated by the aforesaid transmission mechanism for locking both of said valves in closed position.

The'foregoing specification signed at Berlin, Germany, this 16th day of September,

VVILAND ASTFALCK. In presence of-two witnesses:

HENRY HASPER, WOLDEMAR HAUPT 

